JP3054529B2 - Cold storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating outer box having a heat-conductive inner box disposed at an interval, and circulating cool air between the two boxes to provide a storage room in the inner box. To a low-temperature storage for indirectly cooling the storage.

[0002]

2. Description of the Related Art Conventionally, this kind of low-temperature storage is disclosed in Japanese Patent Application Laid-Open No. H4-184071 (F25D23 / 0) previously filed by the applicant.
As in 6), a heat conductive inner box is provided inside the heat insulating outer box with a space therebetween, and a storage room is formed inside the inner box, and formed between the inner box and the outer box. A cooling device including a cooler is provided in the cool air circulation space, cool air is circulated in the cool air circulation space to cool the inner box, and the storage room is indirectly cooled from the inner box wall surface. According to such a low-temperature storage, the water vapor radiated from agricultural products such as vegetables, fruits, or fresh flowers stored therein is retained without being deprived by circulating cold air, so that the articles are stored for a long time while being prevented from being deteriorated due to drying. can do.

[0003] The agricultural products are alive and generate ethylene gas by metabolism. When the concentration of ethylene gas in the storage chamber increases due to such metabolism, there is a problem that the aging of the article is accelerated. Therefore, in the above publication, a plate material of a porous material (green tuff) is attached to the inner box side wall, and the ethylene gas is adsorbed by the porous material and further permeated into the cool air circulation space side, whereby the article as described above is manufactured. It was configured to suppress aging.

[0004]

However, since the porous (green tuff) plate is heavy and easily broken, handling during assembly and maintenance is extremely troublesome. In addition, the adsorption and permeability of ethylene gas are low.
There is also a problem that a regeneration process for releasing the adsorbed ethylene gas once every two to two years has to be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem. In a so-called indirect cooling type low-temperature storage, ethylene gas generated from stored articles is effectively removed, and at the time of assembling the same. The purpose is to make handling of such as easy.

[0006]

A low-temperature storage 1 according to the present invention is provided with a heat-insulating outer box 2 and a heat source which is disposed inside the outer box 2 with a space therebetween and forms a storage room 10 therein. Good inner box 3
And a cool air circulation space 11 formed between the outer case 2 and the inner case 3
And a cooling device 14 disposed in the inner box 3 for cooling the inner box 3 and indirectly cooling the storage room 10 .
A box 26 is attached to the cold air circulation space 11 side of the wall 3F,
Cracking of ethylene cracking catalyst and activated carbon in box 26
The sheet material 31 is stored, and the upper and lower sides of the box 26 are stored.
Vent holes 23 and 24 communicating with the interior of the storage room 10 are formed in the inner box 3.
It has been achieved.

Further, in the low-temperature storage 1 according to the second aspect of the present invention, the holding members (slide rails) 27 and 28 for movably holding the mixed and decomposed sheet agent 31 are provided on the box 26 and the side wall of the inner box 3. An outlet 33 for the mixed and decomposed sheet material 31 is formed in the 3F corresponding to the inside of the box 26, and the outlet 33 is closed by a removable cover.

Further, the low-temperature storage 1 according to the third aspect of the present invention comprises:
According to the first aspect of the present invention, the mixed and decomposed sheet material 31 is provided vertically above and below the box 26, and an eave 32 is disposed above the mixed and decomposed sheet material 31.

According to the low-temperature storage 1 of the present invention, the mixed decomposition sheet material 31 of the ethylene decomposition catalyst and the activated carbon is provided in communication with the storage room 10 which is indirectly cooled from the inner box 3. Ethylene gas generated from articles such as agricultural products stored in the storage tank is chemically oxidized and decomposed by the ethylene decomposition catalyst in the mixed decomposition sheet 31 and is adsorbed on activated carbon. Therefore, aging of the stored articles can be suppressed, and the articles can be stored fresh for a long period of time. Further, the activated carbon in the mixed and decomposed sheet material 31 also adsorbs the bad odor in the storage room 10, so that the deodorizing effect can be expected.

Further, ethylene-decomposing catalyst in mixed decomposition sheet material 31 is significantly greater ethylene capacity than conventional green tuff, therefore, quickly it is able to reduce the ethylene gas concentration in the storage chamber 10 And the amount of use can be reduced, so that the cost can be reduced. Further, since the ethylene cracking catalyst does not need to be regenerated as in the conventional green tuff, the maintainability is remarkably improved. Further, since the mixed and decomposed sheet agent 31 is lighter in weight and less likely to generate cracks and the like as compared with the conventional green tuff plate material, handling during assembly and the like becomes extremely easy.

In particular, the cool air circulation space 11 of the side wall 3F of the inner box 3
A box 26 is attached to the side, and the mixed / decomposed sheet agent 31 is stored in the box 26, and ventilation holes 23 and 24 are formed in the inner box 3 for communicating the upper and lower portions of the box 26 with the inside of the storage room 10. Therefore, the air in the storage room 10 flows to the mixed and decomposed sheet material 31 in the box 26 by natural convection through the ventilation holes 23 and 24. Therefore, the mixed / decomposed sheet material 31 can be connected to and attached to the storage room 10 without reducing the internal volume of the storage room 10.

Further, according to the low-temperature storage 1 of the second aspect of the present invention, in addition to the above, the holding members (slide rails) 27 and 28 for movably holding the mixed and decomposed sheet agent 31 are provided in the box 2
6, the inner box 3 side wall 3F is formed with an outlet 33 for the mixed / decomposed sheet material 31 corresponding to the inside of the box 26, and the outlet 33 is closed by a removable cover 34.
When exchanging the mixed / decomposed sheet material 31, the cover 34 is removed, and the container 33 can be delivered from the storage room 10 side into the box 26 with the opening 33 opened, thereby improving maintenance workability. .

Furthermore, according to the third aspect of the present invention, there is provided a low-temperature storage
In this case, in addition to the invention of claim 1, the mixed and decomposed sheet material 31 is provided vertically above and below the box 26, and the eaves 32 are disposed above the mixed and decomposed sheet material 31, so that dew condensation water and the like can be prevented. Inconvenience that the mixed decomposed sheet material 31 falls down does not occur, and the problem that the mixed decomposed sheet material 31 is submerged and the ethylene treatment capacity is impaired can be solved.

[0014]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional front view of a low-temperature storage 1 of the present invention,
FIG. 2 is a perspective view of one panel 21A constituting the right side wall 3F of the inner box 3 of the low temperature storage 1 of the present invention, and FIG.
FIG. 4 is an enlarged vertical sectional front view of a part of the low-temperature storage 1, and FIG.
FIG. 2 is an enlarged plan sectional view of a low-temperature storage 1 in a portion A.

In FIG. 1, reference numeral 1 denotes a low-temperature storage of the present invention such as a prefabricated refrigerator or the like, in which a heat-conductive inner box 3 is housed and arranged inside a heat-insulating outer box 2 at intervals. A closed storage room 10 is formed in the box 3, and a cool air circulation space 11 is formed around the storage room 10, that is, in a space surrounded by the inner box 3 and the outer box 2. The outer box 2 is formed in a box shape by combining a plurality of heat insulating panels having a convex portion or a concave portion at a connection portion with an adjacent panel.
An article entrance 15 is formed at the center of the front wall, and the article entrance 15 is closed by a heat insulating door 19 so as to be openable and closable.

The inner box 3 includes a top wall 3A, a bottom wall 3B, front and rear left and right side walls 3D, 3E and 3F (front walls are not shown), and support walls 6 connected to the upper ends of the front and rear side walls 3D facing each other. 7 is comprised. The bottom wall 3B and the side walls 3D, 3E, 3F of the inner box 3 are a plurality of panels 21 made of a stainless steel plate (including the panel 21A of the right side wall 3F).
Each of the panels 21 is fixed to the outer box 2 with a fixing member (not shown) at intervals, and a sealing member 22 is interposed between the panels 21. Further, the top wall 3A of the inner box 3 is placed on the upper edges of the support walls 6, 7 and the left and right side walls 3E, 3F, and is fixed by a fixing bracket (not shown). It is inclined low left and right as the center.

In particular, one panel 21A constituting the right side wall 3F of the inner box 3 has a structure as shown in FIG. That is, the ventilation holes 23... And 24.
. Are provided in a plurality, and the ventilation holes 23, 2
4 corresponds to the back surface of the panel 21A (the cool air circulation space 11).
Side), a box 26 also made of stainless steel plate
Screwed up and down from the side. The box 26 has a rectangular shape with only one surface open on the panel 21A side, and the opening is closed when attached to the panel 21A, thereby isolating the inside of the box 26 from the cool air circulation space 11. .

Here, the thickness of the box 26 is limited to about half the width of the cool air circulation space 11 so that the circulation of cool air circulating through the cool air circulation space 11 is not hindered. In addition, vent hole 2
Reference numerals 3 and 24 respectively correspond to the upper and lower sides of the box 26, whereby the inside of the storage room 10 and the inside of the box 26 are vertically communicated.

On the inner surface of the vertical wall 26A of the box 26, opposed slide rails 27 and 28 as holding members are located between the upper and lower ventilation holes 23 and 24, and are spaced apart from each other on the left and right. Screwed up and down. The slide rails 27 and 28 are opposed to each other and have upper and lower cross-section holding flanges 27A and 28A having a substantially U-shaped cross section.
A bottom flange 28B (the bottom flange of the slide rail 27 is not shown) is provided below and spaced apart from 7A and 28A.

The mixed and decomposed sheet material 31 is held between the slide rails 27 and 28 and in the box 26.
・ Is stored. The mixed and decomposed sheet agent 31 is, for example, Kuraray Coal (trade name) manufactured by Kuraray Chemical Co., Ltd., and kneaded with an ethylene decomposition catalyst such as palladium in activated carbon and mixed, and further forms a sheet with a gas-permeable surface material. It is packed. And its weight is, for example, 270m
Approximately 200 g with dimensions of mx 400 mm x 10 mm
Since it is light to the extent and has appropriate flexibility, cracks and the like do not occur. Therefore, handling during assembly and the like is extremely easy. In this embodiment, five such mixed and decomposed sheet agents 31 are used.

These mixed and decomposed sheet materials 31 are held between the slide rails 27 and 28, and the panel 21 of the inner box 3 is
A is stacked up and down along A. At this time, both sides of the mixed / decomposed sheet 31 are held by holding flanges 27A, 28A of the slide rails 27, 28 so as to be vertically movable, and both lower sides of the lower end of the mixed / decomposed sheet 31 are on the bottom flange 28B. Placed on Thereby, the mixed / decomposed sheet material 31 is held between the slide rails 27 and 28 so as to be movable only in the vertical direction.

Further, an eave 32 is arranged above the mixed and decomposed sheet material 31. The rear end of the eave 32 is the box 2
6 is screwed to the vertical wall 26A, is inclined downward to the panel 21A side, and its tip is separated from the panel 21A, thereby covering the upper part of the mixed and decomposed sheet material 31.

Further, the slide rail 2 is provided on the panel 21A.
The two slide rails 27, 28 are provided between the lower ends of the holding flanges 27A, 28A and the bottom flange 28B.
A rectangular outlet 33 having a width therebetween is formed. The outlet 33 is connected to the storage room 1 by the panel 21A.
This is also closed by a stainless steel cover 34 which is detachably screwed from the 0 side. The cover 34 has a holding piece 34A that enters the box 26 from the outlet 33, and the tip of the holding piece 34A abuts and holds the mixed decomposition sheet 31 at the lower end.

A plurality of through holes 37 are formed in the panel 21A above the box 26, and are always closed by a closing plate 38. The through holes 37 are required when the cool air in the cool air circulation space 11 is directly introduced into the storage room 10 to adjust the humidity. In this way, by integrating the box 26 and the through hole 37 into one panel 21A, the low-temperature storage 1
The versatility at the time of assembling or remodeling is improved.

On the other hand, on the lower surface of the right end of the outer box 2 facing the top wall 2A, a cooling device 14 located inside the cold air circulation space 11 is mounted. The cooling device 14 has a built-in cooler 12 constituting a part of a refrigeration cycle and a first blower 13, and the first blower 13 detects the temperature of the cool air in the cool air circulation space 11. Based on the output of a temperature sensor (not shown), a control device (not shown) controls the operation-stop between upper and lower temperatures.

Reference numeral 16 denotes a second air blower installed in the cool air circulation space 11 at the left end of the outer box 2 facing the top wall 2A, and is constantly operated. The cool air circulation space 11 is an upper space 11A as a space above the top wall 3A.
And a lower space 11B as a space below the bottom wall 3B;
A front space (not shown) as a space outside the front wall,
A rear space 11D as a space outside the rear wall 3D,
A left space 11E as a space outside the left side wall 3E;
And a right space 11F as a space outside the right side wall 3F. In the embodiment, the cooling device 14 is disposed in the upper space 11A.

The operation of the low-temperature storage 1 with the above configuration will be described. First, food, for example, vegetables and fruits, or agricultural products such as fresh flowers are stored in the storage room 10 in the uncooled state from the article entrance 15 and the set temperature in the storage room 10 is set to, for example, the ice temperature zone (0 ° C.). When the cooling device 14 is operated by turning on the power, the cooling device 14 is operated by a control device (not shown) based on the output of the temperature sensor because the temperature inside the cool air circulation space 11 is higher than the set temperature. Further, the air sucked into the cooling device 14 by the first blower 13 flows into the cooler 12 and is cooled, after which the air is sucked into the upper space 1.
1A, the inside of the cool air circulation space 11 outside the inner box 3 is shown in FIG.
It is forcibly circulated as shown by the middle arrow.

When the temperature in the cool air circulation space 11 reaches the lower limit temperature, for example, -3 ° C., the first blower 1
3 is stopped and operated when the temperature reaches an upper limit temperature such as -1 ° C. Each wall of the inner box 3 is cooled by such cold air circulation,
The inside of the storage room 10 is indirectly cooled by radiant heat from each wall surface. Further, the second blower 16 is provided in the cool air circulation space 1.
A pressure difference is forcibly generated in the circulating cool air in the space 1 to diffuse the cool air in this space over a wide range, and the cool air is circulated uniformly in the cool air circulation space 11 so that the entire inner box 3 can be efficiently operated. After cooling, the storage room 10 is cooled from the entire wall of the inner box 3.

On the other hand, ethylene gas is released from the stored agricultural products by metabolism. The ethylene gas, together with the air in the storage room 10, is conveyed by natural convection from the upper ventilation holes 23 as shown by arrows in FIG. Flows into the body 26,
The mixed and decomposed sheet material 31 flows up and down inside and around, and flows out into the storage room 10 through the lower ventilation holes 24.

At this time, the ethylene gas in the flowing air is chemically oxidatively decomposed by the ethylene decomposition catalyst in the mixed decomposition sheet material 31 and is also adsorbed on activated carbon (the adsorbed ethylene is also oxidatively decomposed by the catalyst). ). Also,
The odor generated from agricultural products is also adsorbed by the activated carbon in the mixed decomposition sheet agent 31. As a result, an increase in the ethylene gas concentration in the storage room 10 is prevented, the progress of the aging of the agricultural products is suppressed, and the bad odor in the storage room 10 is removed, and the quality deterioration due to the odor transfer to other foods is prevented. Is done.

In particular, since the ethylene cracking catalyst in the mixed cracking sheet material 31 has a remarkably large ethylene treatment capacity as compared with the conventional green tuff, the ethylene gas concentration in the storage room 10 can be rapidly reduced. In addition, since the number of uses can be reduced, the cost is also reduced. Further, since the ethylene cracking catalyst chemically decomposes ethylene, it is not necessary to regenerate it as in the conventional green tuff which only adsorbs ethylene, so that the maintainability is remarkably improved.

The ethylene decomposition catalyst in the mixed decomposed sheet agent 31 is hardly affected by moisture. However, if the mixed decomposed sheet agent 31 is flooded by dew condensation water or the like, the flow of air is reduced. Because of the significant loss, ethylene processing capacity is also reduced. However, in the present invention, the mixed and decomposed sheet material 31 laminated vertically and the eave 32 above
Is provided, the dew condensation water and the like do not fall on the mixed and decomposed sheet agent 31. Therefore, the problem that the ethylene treating ability of the mixed and decomposed sheet agent 31 is impaired by the flooding is also solved.

Further, in the present invention, the box 26 is attached to the panel 21A on the side of the cool air circulation space 11, and the upper and lower sides of the box 26 and the inside of the storage room 10 are communicated by the ventilation holes 23 and 24. The mixed / decomposed sheet material 31 can be connected to the storage room 10 and attached without reducing the internal volume.

Next, when replacing the mixed / decomposed sheet material 31..., The screws are removed, the cover 34 is removed from the panel 21A, and the outlet 33 is opened. Then, a hand is inserted from the opened outlet 33, and the mixed and decomposed sheet material 31 is removed from the lower end of the mixed and decomposed sheet material 31 sequentially to the storage chamber 10 side. Then, a new mixed / decomposed sheet material 31 is inserted into the box 26 from the outlet 33, inserted between the slide rails 27 and 28, and sequentially pushed upward to laminate five mixed / decomposed sheet materials 31. I do. After that, the outlet 33 is closed again by the cover 34,
The mixed decomposition sheet material 31 at the lower end is pressed by the holding piece 34A.

As described above, in the present invention, when replacing the mixed / decomposed sheet material 31..., It is possible to remove the cover 34 and leave the outlet 33 in the box 26 from the storage room 10 with the outlet 33 opened. As a result, maintenance workability is also improved.

[0036]

As described above in detail, according to the present invention, a mixed decomposition sheet material of an ethylene decomposition catalyst and activated carbon is provided in communication with a storage room of a so-called indirect cooling type low-temperature storage, and is stored in the storage room. Ethylene gas generated from articles such as agricultural products is chemically oxidatively decomposed by the ethylene decomposition catalyst in the mixed decomposition sheet material and is adsorbed on activated carbon. Therefore, aging of the stored articles can be suppressed, and the articles can be stored fresh for a long period of time. Further, the activated carbon in the mixed and decomposed sheet agent also absorbs the offensive odor in the storage chamber, so that a deodorizing effect can be expected.

Further, ethylene-decomposing catalyst in mixed decomposition sheet material is significantly greater ethylene capacity than conventional green tuff, therefore, it becomes possible to lower rapidly the ethylene gas concentration in the storage compartment Since the amount of use can be reduced, the cost can be reduced. Further, since the ethylene cracking catalyst does not need to be regenerated as in the conventional green tuff, the maintainability is remarkably improved.
Furthermore, the mixed and decomposed sheet agent is lighter in weight and less likely to cause cracks and the like as compared with the conventional green tuff plate material, so that handling at the time of assembly and the like becomes extremely easy.

In particular, a box is attached to the side of the inner box on the side of the cool air circulation space, the mixed and decomposed sheet material is stored in the box, and a vent hole communicating between the upper and lower portions of the box and the storage chamber is formed in the inner box. Therefore, the air in the storage chamber flows to the mixed and decomposed sheet agent in the box body by natural convection from the ventilation hole. Therefore, the mixed and decomposed sheet material can be connected to and attached to the storage chamber without reducing the volume of the storage chamber.

According to the second aspect of the present invention, in addition to the above, a holding member for movably holding the mixed / decomposed sheet agent is provided on the box, and the mixed / decomposed sheet is provided on the inner box side wall corresponding to the inside of the box. An outlet for the agent was formed, and this outlet was closed with a removable cover, so when replacing the mixed and decomposed sheet agent, the cover was removed and the box was opened from the storage room side with the outlet open. Can be delivered to the body,
Maintenance workability is improved.

Further , according to the third aspect of the present invention,
In addition to the invention of Item 1, the mixed and decomposed sheet is provided over and under the box body, and the eaves are disposed above the mixed and decomposed sheet, so that the inconvenience that dew water or the like falls on the mixed and decomposed sheet may also occur. However, it is also possible to solve the problem that the mixed decomposition sheet agent is submerged and the ethylene treatment capacity is impaired.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a low-temperature storage of the present invention.

FIG. 2 is a perspective view of a panel constituting a right side wall of an inner box of the low-temperature storage of the present invention.

FIG. 3 is an enlarged vertical sectional front view of a low-temperature storage in a panel portion of FIG. 2;

FIG. 4 is an enlarged plan sectional view of a low-temperature storage at the panel portion of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature storage 2 Outer box 3 Inner box 3F Right side wall 10 Storage room 11 Cold air circulation space 14 Cooling device 21A Panel 23 Vent hole 24 Vent hole 26 Box 27 Slide rail 28 Slide rail 31 Mixed decomposed sheet agent 32 Eave 33 Outlet 34 cover

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yasuhito Kondo 2-5-5-1 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-3-102178 (JP, A) Kaihei 1-217170 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 23/00 302 F25D 17/08 311

Claims (3)

(57) [Claims] 1. A heat insulating outer box, a thermally conductive inner box disposed inside the outer box with a space therebetween to form a storage room therein, and an inner box between the outer box and the inner box. A cooling device disposed in a cool air circulation space formed in the cold room that cools the inner box and indirectly cools the storage room . Attach body,
This box contains a mixed cracking system of ethylene cracking catalyst and activated carbon.
And the upper and lower sides of the box body and the storage
A vent hole communicating with the room is formed in the inner box.
A low-temperature storage to be used. 2. A mixed and decomposed sheet agent is movably held.
The holding member is provided on the box, and the box
Forming an outlet for the mixed and decomposed sheet agent corresponding to the inside;
The outlet is closed with a removable cover.
The low-temperature storage device according to claim 1. 3. A mixed and decomposed sheet material extending up and down in a box body.
And an eave above the mixed and decomposed sheet agent.
The low-temperature storage according to claim 1, wherein the low-temperature storage is provided.